Re: [PATCH v10 2/2] leds: sc27xx: Add pattern_set/clear interfaces for LED controller
From: Pavel Machek
Date: Thu Sep 06 2018 - 17:16:11 EST
Hi!
> diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx
> new file mode 100644
> index 0000000..d8056d5
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx
> @@ -0,0 +1,22 @@
> +What: /sys/class/leds/<led>/hw_pattern
> +Date: September 2018
> +KernelVersion: 4.20
> +Description:
> + Specify a hardware pattern for the SC27XX LED. For the SC27XX
> + LED controller, it only supports 4 stages to make a single
> + hardware pattern, which is used to configure the rise time,
> + high time, fall time and low time for the breathing mode.
> +
> + For the breathing mode, the SC27XX LED only expects one brightness
> + for the high stage. To be compatible with the hardware pattern
> + format, we should set brightness as 0 for rise stage, fall
> + stage and low stage.
> +
> + Min stage duration: 125 ms
> + Max stage duration: 31875 ms
> +
> + Since the stage duration step is 125 ms, the duration must be
> + a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms.
> +
> + Thus the format of the hardware pattern values should be:
> + "0 rise_duration brightness high_duration 0 fall_duration 0 low_duration".
If I'm not mistaken, this is:
"0 rise_duration brightness high_duration brightness
fall_duration 0 low_duration".
Right?
With that fixed:
Acked-by: Pavel Machek <pavel@xxxxx>
And... thanks!
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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